Modeling milk urea of Walloon dairy cows in management perspectives.
peer reviewed ; The aim of this study was to develop an adapted random regression test-day model for milk urea (MU) and to study the possibility of using predictions and solutions given by the model for management purposes. Data included 607,416 MU test-day records of first-lactation cows from 632 dairy herds in the Walloon Region of Belgium. Several advanced features were used. First, to detect the herd influence, the classical herd x test-day effect was split into 3 new effects: a fixed herd x year effect, a fixed herd x month-period effect, and a random herd test-day effect. A fixed time pe... Mehr ...
Verfasser: | |
---|---|
Dokumenttyp: | journal article |
Erscheinungsdatum: | 2009 |
Verlag/Hrsg.: |
American Dairy Science Association
|
Schlagwörter: | milk urea / test day model / autoregression / target range / Life sciences / Animal production & animal husbandry / Genetics & genetic processes / Sciences du vivant / Productions animales & zootechnie / Génétique & processus génétiques |
Sprache: | Englisch |
Permalink: | https://search.fid-benelux.de/Record/base-27292687 |
Datenquelle: | BASE; Originalkatalog |
Powered By: | BASE |
Link(s) : | https://orbi.uliege.be/handle/2268/20351 |